A road-rage confrontation left a 30-year-old woman dead and her killer facing a murder charge after the victim was shot in the head in far southwest Harris County early Thursday morning.

Veronica Soto was discovered fatally shot about 12:30 a.m. at 7703 Las Brisas near Paso Real, according to the Harris County Sheriff's Office.

Investigators later determined the gunfire erupted as Soto and her husband were in their vehicle and he got into an argument with people in two other cars. The argument escalated when the Sotos' vehicle was boxed in by the other drivers.

Then a passenger in one of the other vehicles got out and went to his nearby home. He grabbed a rifle, came back outside and opened fire on the Sotos as they drove away. Several bullets hit the rear of the Sotos' car.

Soto, who was a passenger in the front seat, was wounded in the head. She died at the scene.

No other injuries were reported.

Investigators later learned the identity of the gunman. The 20-year-old man admitted his role in the shooting when investigators questioned him about it. He was taken into custody.

Deputies said charges have not been filed so far, but the gunman is expected to be charged with murder.

The Chronicle has not named him because he has not been formally charged yet.